Why are Achillies Tangs considered an "Expert Only" fish?

I was just wondering these seem like any other tang.

 

They are extremely sensitive, picky and aggressive. They make powder blue tangs look like damsels in terms of livability.

 

Ah I see... Too bad they're uber cool :-/

 

I know, I feel the same way with the shrimpfish

 

also they are very difficult to get to eat. most of the time they die from starvation, OR they die from disease.

 

Unlike other tangs, they attack ALL large fish not just rival tangs.

 

I read that they are collected from turbulent water, so they need a ton of flow.

 

So there go my plans for whenever I upgrade to a 180+ gallon tank.

 

This is a good thread.

http://www.3reef.com/forums/fish-month/fotm-november-2010-achilles-tang-98058.html

 

I know a few people that have kept them in community tanks with several other tangs too. There is something to be said for individual personality. Helps if they are added last, but then you need a robust specimen to not get stressed and die.